Die-press.



No. 660,125. Patented oct. 23,1900.

E. W. SILSBY.

DIE PRESS.

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UNITED STATES I PATENT OFFICE.

EUGENE W. SILSBY, OF LA GRANGE, ILLINOIS.

DIE-PRESS.

SPECIFICATION forming part of Letters Patent No. 660,126, dated October 23, 1900.

Application filed January 5, 1900. Serial No. 461. (No model.)

To a/ZZ whom it may concern:

Be it known that I, EUGENE W. SILsBY, a citizen ot' the United States, residing at La Grange, county of Cook, and State of Illinois, (and having my post-office address at No. 403 East Division street, Chicago, in the county and State aforesaid,) have invented certain new and useful Improvements in Die-Presses, which are fully set forth in the following speciiication, reference being had to the accompanyingdrawings,formingapart thereof.

The purpose of this invention is to provide a simplified construction for a die-press having a head reciprocating toward and from a fixed base. It is especially adapted to a direct-stroke pressthat is, one in which the movement is communicated to the reciprocating head directly from a pedal actuated by the operator; but it is not inapplicable to a press driven by power.

In the drawings, Figure l is a front elevation of myimproved press with certain of the parts broken out and shown in vertical section to disclose details of construction. Fig. 2 is a section at a plane of the line 2 2 on Fig. l. Fig. 3 is a perspective ofV a templet which I use in assembling the several parts of the press.

A represents any convenient standard for the press.

B is the xed bed of the press, which rests upon the standard A.

C is a reciprocating head. p

D D are parallel side bars or draft-rods which extend from the head C through the fixed base B and are connected below the base and the top of the standard by the crossbar E.

F is an oscillating carrier for two lower dies, which by means of the oscillation of the carrier are brought alternately-that is to say, each at will-into operative relation to an upper die, which may be carried by thereciprocating head C. The dies are not shown, their construction being not material to my invention.

G is a pedal operatively connected to the cross-bar E and retracted by a spring K,which thereby retracts the reciprocating head and parts rigid therewith.

In order that the coperating dies may register perfectly, as is necessary to properwork,

it is evidently essential that the two draftrods or side bars D D, which both guide and operate the reciprocating head O, shouldbe perfectly parallel and should be also accurately fitted to the guide-bearings which they obtain in the plate C and through which they reciprocate in giving action to the die. Ordinarily-that is to say, by the ordinary methods employed in machine constructionof the most expert workmen and would therefore, as well as by reason of the actual amount of machine-work required, be an expensive task and make an expensive machine. All

this expensive and technically-diflicult work I avoid in the following manner:

The reciprocating head C is cast with bosses C' O,'having apertures c' c at proper positions to receive the rods D, and with a further boss C2'at the position at which the upper die is to be secured. 'Ihel apertures c for the rods are cast large enough to admit the rods loosely and,in fact, with considerable space around the rods. These apertures are also chambered at C10-that is, enlarged between the ends-'leaving shoulders at the points of reduction of the apertures for such enlargement to the lesser diameter at the ends. For use in assembling the parts I provide' a rectangular templet M of cast-iron,

' bosses M20 at the center,all said holes being of diameter to'admit the side bars D D substantially without play, not making ladrive fit, but as close a iit as consistent with passing the rods through the aperture's'without driving. For Vthe side bars D D, I employ roundBessemer-steel rods of suitable gage, which dispenses with machine-work in order to obtain the desired lit of the rods to the drilled apertures.

The ends of the rods D Iooy D are threaded for a distance approximately the thickness of the reciprocating head C at the aperture c. The rods D D being passed through the holes in the templet are entered from below into the holes o' and protruded above the opposite side of the head, the templet beingthen set up to the machined faces of the bosses on"the under side of the head and there clamped,while Babbitt metal is poured into the spaces aroundthe rods in the holes o', filling the recesses C10 and the thread ofthe rods. When the Babbitt metal is fully set, nuts CZ dmay be applied to the protruding threaded ends of the rods above the head C. The nuts take the strain of operation and the Babbitt metal serves to insure perfect parallelism of the rods and to prevent any lateral displacement of the head and is entirely adequate for this purpose, notwithstanding its relative softness as compared with the cast-iron. The base B is made of castiron with apertures B B', enough greater in diameter than the rods D D to receive a sleeve large enough to pass onto the rods and of sufficient thickness to aord a rigid bearing for the rods and leave some space still outside such sleeve in the aperture. These apertures are chainbered between the ends at bw Z710 in the same manner as the apertures in the head C. To afford the actual guide-bearings for the rods, I employ brass tubes or sleeves H H, which are of standard dimensions, the inner diameter be ing such as to make a close fit on the rods D D. These tubes or sleeves are of such length as to afford an adequately-long bearing for the rods, to give certainty of direction to the reciprocation of the latter. The sleeves being passed onto the rods, the rods, with the sleeves thus upon them, are inserted down through the apertures in the base, the machined faces of the boss M20 of the templet M are brought to the machined upper face of the base (or ofthe bosses thereon around the apertures and elsewhere,as hereinafter explained) and clamped in position, the structure being then inverted, and the space within the apertures B', around the sleeves H H, is poured full of Babbitt metal, which is allowed to set beforethe parts are moved. The head and rods rigid therewith may now be withdrawn, the sleeves H being left secured in the base by the Babbitt metal setting tightly around them and being itself prevented from escaping from the casting by the metal filling the recesses om. To further insure the retention of the sleeves by the Babbitt metal, an outer thread may be ont or the sleeves at a portion of their length covered by the babbitt; but this is not ordinarily necessary, the smooth surface of the tubing being grasped with sufficient firmness by the babbittcooling around it.

The oscillating die-carrier F may be pivoted about one of the draft-rods D; but its actual bearing is preferably not obtained upon the rod; but an annular bearing is provided for it around and concentric with the rod. A very convenient and economical method of providing such bearing consists in causing the sleeve H to protrude above the bed for a sutiicient distance to serve as such ubearing for the oscillating carrier. Vhen this construction is to be employed, it is necessary to-provide space for the protruding end of the sleeve in the templet, so that the tmachined face ot' the templet may reach the machined faces of the bosses upon the upper -side of the plate B in adjusting the parts, as `above described, for the purpose of securing 'the sleeves parallel and properly alined with the rods. For this reason the tem plet is made with the bosses, as described, instead of with a plain outer face of the flange M2, as in the case of the flange M', and the recess to receive the protruding portion of the sleeve is formed at m21 in these bosses, concentric with apertures m20, provided for the rods D,

In this specification and the following` claims l use the term Babbitt metal to signify any metal having a relatively-low fusingpoint and a suitable firmness when cooled to adapt it to the purpose' described. Manifestly such a metal as lead may be employed; but I employ the term babbitt because it has in use acquired a more generic significauce than the name of any specific metal.

I claiml. In a press, a reciprocating cast-metal head having parallel draft bars inserted through apertures cast in the head larger than the draft-bars and fixed therein as to dii'ection by Babbitt metal run into the space ,in the apertures around the draft-bars; stops on the ends of the draft-bars, beyond the head, taking the draft strain olf the Babbitt metal; the xed base having guide-bearings for the draft-bars; and means operating on the draftbars below the base to reciprocate the head.

2. In a press a reciprocating head having parallel draft-bars rigid with it; a fixed base having guide-bearings for the draft-bars, and means operating the draft-bars below the base to reciprocate the head, the base being cast with apertures for the guide-bearings, such bearings being metal tubes or sleeves of less outer diameter thanthe apertures, and being fixed in the apertures by Babbitt metal occupying the space of the apertures around such sleeves.

3. In a press a reciprocating head having parallel draft-bars; a fixed bed having guidebearings for the draft-bars; a cross-bar connecting the draft-bars at the opposite side of the fixed bed from the reciprocating head; and means operating on such cross-bar to reciprocate the head.

4. A press, comprising a fixed bed having parallel vertical tubes or sleeves extending through it and secured in it by Babbitt metal; an upper head having parallel draft-rods which are longitudinally guided in the tubes of the bed, and are iixed in such head as to direction by such Babbitt metal; a cross-bar connecting the draft-rods below the head; and

IOC

means operating on the cross-bar to reciprocate the head.

5. A press, comprising a cast-metal bed having vertical apertures made in casting; metal tubes or sleeves of suitable cross-section to pass loosely through the apertures of the cast-metal bed and fixed therein, as to direction, by Babbitt metal surroundingthe same within the apertures of the casting; a cast-metal head having apertures formed in casting corresponding to those of the bed and draft-rods which are guided in the tubes, respectively, and are of suitable cross-section to pass loosely into the apertures of the head; such draft-rods being iixed in the head, as to direction, by Babbitt. metal occupying the space in the apertures around such rods; a cross-bar connecting the ends of the draftbars below the head; and means operating on the cross-bar to'reciprocate the head.

6. A press comprising a fixed bed; a reciprocating head above the bed, and an oscillating die-carrier on the bed, the head having two parallel draft-bars rigidly extending downward from it through the bed, the latter having suitable guide-bearings for such draftbars; means operating below the bed to reci procate the bars through their bearings and thereby reciprocate the head; the bearing of one of the bars consisting of a tube secured in the bed and protruding above the same, the protruding portion of such tube constit-uting a journal-bearing for the oscillating carrier.

7. A die-press comprising a fixed cast-iron bed having two vertical apertures formed through it in casting; tubes extending to be loose therein, such tubes being xed in the bed by Babbitt metal lling the apertures around the tubes; a reciprocating head above the bed, having parallel draft-bars which extend through and are afforded guide-bearings in the tubes, one of said tubes being extended above the upper surface of the bed; and an oscillating die-carrier pivoted about such protruding portion.

8. A die-press comprising a fixed bed, a reciprocating head above the saine, both made of cast-iron and formed in casting with substantially alined vertical apertures; metal tubes extending through the apertures of the bed and of suitable diameter to be loose therein; parallel draft-bars which obtain guidebearings in the tubes, and of suitable diameter to extend loosely through the cast apertures in the head; such draft-bars being fixed to the head, as to direction, by Babbitt metal occupying the space around them in the apertures of the head; means operating on the draft-bars below the base to reciprocate the head; the tube which forms one of the guidebearings of the rods'being protruded above the upper surface of the bed, and an oscillating die-carrier pivoted on such protruding tube.

` In witness whereof I have hereunto set my hand, at Chicago, Illinois, in the presence of two witnesses, this second day of January,

E. W. SILSBY. In presence 0f- C. S. BURTON, E. L. CoNANT. 

